Invest quarterly maintenance in your top 5% most-connected notes — they are your graph infrastructure
Identify your top 5% of notes by connection count and schedule quarterly reviews where you verify each hub note is current, accurate, and well-linked, investing maintenance effort proportional to structural importance.
Why This Is a Rule
A knowledge graph follows a power-law distribution: a small percentage of notes (hubs) have a disproportionate number of connections, while most notes have few. The top 5% by connection count are your graph's infrastructure — they appear in more retrieval paths, they're linked from more contexts, and they influence more of your system's behavior than any individual peripheral note.
An outdated, inaccurate, or poorly-linked hub note doesn't just produce one bad result — it degrades every retrieval path that passes through it. If your "feedback loops" hub note contains outdated examples or missing links, every search that touches feedback loops returns degraded results.
Differential maintenance — investing more review effort in structurally important notes — matches maintenance cost to maintenance value. Quarterly reviews of the top 5% take a few hours and maintain the infrastructure that thousands of peripheral notes depend on. Reviewing all notes equally would take far longer while providing less value per minute.
When This Fires
- During quarterly knowledge system maintenance
- When retrieval quality degrades for common topics (probably a hub note issue)
- After significant new learning that might have outdated hub note content
- During any knowledge system audit focused on structural health
Common Failure Mode
Treating all notes equally in maintenance: reviewing recent notes or random notes rather than prioritizing by structural importance. A peripheral note with 1 link and a hub with 50 links get the same maintenance attention — but the hub's maintenance produces 50x the downstream improvement.
The Protocol
Quarterly: (1) Sort notes by connection count (inbound + outbound). (2) Identify the top 5% (for a 500-note system, that's ~25 hub notes). (3) For each hub: is the content still accurate? Are the links still valid and well-labeled? Are there new notes that should link here but don't? (4) Update, add missing links, correct outdated content. (5) The quarterly hub review is the highest-leverage maintenance activity in your knowledge system.